水稻黄化矮缩病的发生特点及防治技术初探

Occurrence Characters and Prevented Techniques of Rice Huanghuaaisuo Disease

阐述了水稻黄化矮缩病在庆安县的发生特点及危害程度。通过改良排灌系统、烧毁病稻草、剔除伤病苗等措施,防效在60％～65％。发病初期,用25％瑞毒霉粉剂800倍液或58％瑞毒锰锌500倍液喷施,防效可达80％;用50％多菌灵800倍液或50％托布津1000倍液喷施防效在70％～80％之间。

State occurrence characters and harmful extent of rice Huanghuaaisuo disease in Qingan county. The prevented effect reached 60%-65% that improving irrigation system, burning down ill straws and getting rid of ill seedlings and so on. In early occurrence period, the effect that spray 25%Ruidumei powder 800 multiples liquid or 58% Ruidu Mn Zn 50 multiples liquid reached 80%, the effect that spray 50% Duojunling 800 multiples liquid or 50% Topsin 1 000 multiples liquid reached 70%-80%.